The objective ofthis study was to evaluate the sugarcane silage in relation to chemical composition,pH, total losses, aerobic stability, in vitro digestibility of dry matter(IVDDM) and effective degradability (ED) of bovine and buffaloes underthe following treatments (on a dry matter (DM) basis): sugarcane silage control(control), with addition of 3.3% urea; with addition of Lactobacillus buchneri(inoculate); with inoculate + 3.3% urea; with inoculate + 25.0% soybean hull,and with inoculate + 25.0% cassava byproduct meal. The experiment was analyzedthrough a completely randomized design with three replications, and for DM ED,a double 4 × 4 Latin square with a 4 × 2 factorial arrangement wasused. The sugarcane variety was the RB-855156 (precocious). The urea increasedthe protein level and reduced neutral and acid detergent fiber and lignin fractions.Treatments with inoculate + cassava byproduct and inoculate + soybean hull increasedDM levels. Bovines presented higher IVDDM than buffaloes. pH values variedfrom 3.1 to 4.0. Mean total losses observed were 7.8%. Treatments with inoculate+ cassava and inoculate + soybean hulls resulted in larger aerobic stabilitywith 61 and 81 hours, respectively, in relation to silages control (24 h) andcontrol with 3.3% urea (33 h). A higher DM ED was verified for silages withinoculate + control and inoculate + soybean hulls at 2%/h passage rates andhigher neutral detergent fiber ED for the treatment of control + inoculate +soybean hulls at 2 and 5%/h. Silages treated with urea, L. buchneri oragricultural byproduct plus inoculate presented better quality pattern.